Gwok Jing and Hui Juk are two Jin Yong characters who are seldom part of the same conversation. The only reason I ever thought of them at the same time is because Felix Wong portrayed both characters for TVB during the 1980s.
As I thought about that point, however, it dawned on me that they shared a number of characteristics in common:
1). Both were regarded as slow learners/slightly stupid during their youths, but nevertheless emerged as among the most powerful martial artists of their times.
2). Both became prince consorts of foreign (e.g. non-Han) regimes.
3). Both learned Hong Lung 28/18 Palms from a Beggar's Union Chief, but neither one was a Union Chief himself or even a member of the Union.
4). Both of them suffered watching their mothers commit suicide in their presences (Cheung Mo Gei suffered this fate as well).